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    Wyświetlanie 1-7 z 7
    Tytuł:
    Investigation of corpuscular emission from the Prague Capillary Pinch
    Autorzy:
    Skladnik-Sadowska, E.
    Baranowski, J.
    Sadowski, M.
    Kolácek, K.
    Ripa, M.
    Ctibor, P.
    Kishinets, A.
    Rupasov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147142.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    capillary pinch
    corpuscular flux
    track detectors
    X-radiation
    Opis:
    The paper presents results of preliminary measurements of the corpuscular radiation from fast z-pinch discharges, which were performed at the Prague Capillary Pinch facility within a frame of the Czech-Polish scientific collaboration programme. Time-integrated measurements were performed by means of a pinhole camera, equipped with nuclear track detectors of the CR-39 type. In order to perform time-resolved measurements the use was made of a single Faraday-type collector and a double-cup system. It was demonstrated that the fast capillary discharges can emit not only pulses of intense visible radiation and soft X-rays, but also pulses of the corpuscular radiation. An optical analysis of the particle tracks was performed. The particle flux at a distance of 20 cm from the collimator outlet was estimated to be 3.5×107 particles/cm2.
    Źródło:
    Nukleonika; 2002, 47, 1; 31-37
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of characteristics of pulsed ion beams emitted from different small PF devices
    Autorzy:
    Sadowski, M.
    Skladnik-Sadowska, E.
    Baranowski, J.
    Zebrowski, J.
    Kelly, H.
    Lepone, A.
    Marquez, A.
    Milanese, M.
    Moroso, R.
    Pouzo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146809.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Faraday cups
    ion beams
    plasma focus
    Thomson analyzers
    track detectors
    Opis:
    The paper concerns studies of pulsed ion beams emitted from different small-energy (5–50 kJ) devices of the plasma focus (PF) type. Emission characteristics of the ion beams as measured with nuclear track detectors (NTDs), Faraday-type collectors (FC), and Thomson-type analyzers, are summarized. Common features of the ion emission are considered and some differences are discussed.
    Źródło:
    Nukleonika; 2000, 45, 3; 179-184
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient plasma loads to the ITER divertor surfaces : simulation experiments with QSPA Kh - 50
    Autorzy:
    Garkusha, I. E.
    Aksenov, N. N.
    Chuvilo, A. A.
    Landman, I. S.
    Makhlaj, V. A.
    Malykhin, S. V.
    Pugachev, A. T.
    Sadowski, M. J.
    Skladnik-Sadowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/147812.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma accelerator
    transient loads
    tungsten
    dust
    fusion reactor
    Opis:
    Experimental simulations of International Thermonuclear Experimental Reactor (ITER) transient events with relevant heat load and particle load parameters have been performed with a quasi-stationary plasma accelerator QSPA Kh-50. Pulsed plasma guns PPA and IBIS were also used for comparative studies of surface damages appearing under varying plasma parameters and sorts of plasma ions. Particular attention is paid to the material erosion due to particles ejection from the tungsten surfaces both in the form of droplets and solid dust. Generation mechanisms of the dust in the course of ELM-like plasma impacts to the tungsten surfaces are discussed
    Źródło:
    Nukleonika; 2012, 57, 2; 167-170
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the nature of changes in the optical characterization produced in sapphire on its irradiation with a pulsed powerful stream of hydrogen ions
    Autorzy:
    Gribkov, V.
    Ivanov, L.
    Maslyaev, S.
    Pimenov, V.
    Sadowski, M.
    Skladnik-Sadowska, E.
    Banaszak, A.
    Kopeć, G.
    Cheblukov, Y.
    Kozodaev, M. A.
    Suvorov, A. L.
    Smirnov, I. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/147991.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    optical characteristics
    irradiation
    fast ion stream
    morphology
    Opis:
    Changes in the optical characteristics in synthetic sapphire specimens produced by microsecond pulse irradiation with a stream of hydrogen ions of energies ranging up to tens keV have been observed. Data on decrease in the optical reflection, measured within the wavelength range of 200 900 nm, are presented. This characterization is compared with the data received by optical and atomic force microscopy as well as by lattice structure analysis performed with X-rays. The measurements indicate that the changes of optical parameters are not a consequence of absorption increase and/or sapphire decomposition. They result from modifications of the morphology and structure of surface layer of the sapphire samples, induced by irradiation.
    Źródło:
    Nukleonika; 2004, 49, 2; 43-49
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical emission spectroscopy of plasma streams in PF-1000 experiments
    Autorzy:
    Jakubowska, K.
    Kubkowska, M.
    Skladnik-Sadowska, E.
    Malinowski, K.
    Marchenko, A. K.
    Paduch, M.
    Sadowski, M. J.
    Scholz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146628.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dense plasma focus (DPF)
    optical emission spectroscopy
    deuterium Balmer series
    Ar II lines
    electron density
    Boltzmann plot
    Opis:
    The optical spectroscopy in the visible range was used to determine properties of the dense magnetized plasma generated in the PF-1000, a 1 MJ plasma focus device operating in the Institute of Plasma Physics and Laser Microfusion (IPPLM) in Warsaw, Poland. The experiments were performed in a vacuum chamber pumped out to the basic pressure of 2 x 10.5 hPa. The initial pressure of the pure deuterium filling was 2.9 hPa, while that of the deuterium--argon mixture was 1.07 hPa of D2 and 0.13 hPa of Ar. The deuterium-plasma emission contained the Balmer series (Dalfa, Dbeta and Dgamma) and a few distinct copper (Cu I) lines originating from the inner electrode material. The emission of the deuterium-argon plasma was rich in Ar II lines. The electron density (ne), averaged over line of sight, of order of 1016 cm.3 was calculated on the basis of the Dalfa and Dbeta emission only, because the D�ż line was strongly self-absorbed. A group of the Ar II spectral lines was used to estimate the excitation temperature (Texc = 3 eV) by means of a Boltzmann plot. Additionally, the temporal evolution of the electron density was determined on basis of the Stark broadening of the Dalfa and Dgamma lines.
    Źródło:
    Nukleonika; 2011, 56, 2; 125-129
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of optical spectra recorded during DPF-1000U plasma experiments with gas-puffing
    Autorzy:
    Zaloga, D. R.
    Skladnik-Sadowska, E.
    Kubkowska, M.
    Ladygina, M. S.
    Malinowski, K.
    Kwiatkowski, R.
    Sadowski, M. J.
    Paduch, M.
    Zielinska, E.
    Makhlaj, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147780.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    electron density
    gas-puff
    optical spectrum
    plasma focus
    plasma stream
    Opis:
    The results are presented of the optical spectra measurements for free plasma streams generated with the use of the modifi ed DPF-1000U machine. This facility was recently equipped with a gas injection system (the so-called gas-puff) placed on the symmetry axis behind the central opening in the inner electrode. The DPF-1000U experimental chamber was fi lled up with pure deuterium at the initial pressure of 1.6 or 2.4 mbar. Additionally, when the use was made of the gas-puff system about 1 cm3 of pure deuterium was injected at the pressure of 2 bars. The gas injection was initiated 1.5 or 2 ms before the triggering of the main discharge. The investigated plasma discharges were powered from a condenser bank charged initially to 23 kV (corresponding to the energy of 352 kJ), and the maximum discharge current amounted to about 1.8 MA. In order to investigate properties of a dense plasma column formed during DPF-1000U discharges the use was made of the optical emission spectroscopy. The optical spectra were recorded along the line of sight perpendicular to the vacuum chamber, using a Mechelle®900 spectrometer. The recent analysis of all the recorded spectra made it possible to compare the temporal changes in the electron density of a freely propagating plasma stream for discharges without and with the gas-puffing. Using this data an appropriate mode of operation of the DPF-1000U facility could be determined.
    Źródło:
    Nukleonika; 2015, 60, 2; 309-314
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of tungsten surface interaction with plasma streams at DPF-1000U
    Autorzy:
    Ladygina, M. S.
    Skladnik-Sadowska, E.
    Zaloga, D. R.
    Malinowski, K.
    Sadowski, M. J.
    Kubkowska, M.
    Kowalska-Strzeciwilk, E.
    Paduch, M.
    Zielinska, E.
    Miklaszewski, R.
    Garkusha, I. E.
    Gribkov, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147638.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    DPF-1000U
    electron density
    gas puffing
    plasma stream
    tungsten
    Opis:
    In this note experimental studies of tungsten (W) samples irradiated by intense plasma-ion streams are reported. Measurements were performed using the modified plasma focus device DPF-1000U equipped with an axial gas-puffing system. The main diagnostic tool was a Mechelle®900 optical spectrometer. The electron density of a freely propagating plasma stream (i.e., the plasma stream observed without any target inside the vacuum chamber) was estimated on the basis of the half-width of the Dβ spectral line, taking into account the linear Stark effect. For a freely propagating plasma stream the maximum electron density amounted to about 1.3 × 1017 cm–3 and was reached during the maximum plasma compression. The plasma electron density depends on the initial conditions of the experiments. It was thus important to determine first the plasma flow characteristics before attempting any target irradiation. These data were needed for comparison with plasma characteristics after an irradiation of the investigated target. In fact, spectroscopic measurements performed during interactions of plasma streams with the investigated W samples showed many WI and WII spectral lines. The surface erosion was determined from mass losses of the irradiated samples. Changes on the surfaces of the irradiated samples were also investigated with an optical microscope and some sputtering and melting zones were observed.
    Źródło:
    Nukleonika; 2015, 60, 2; 293-296
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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